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Atlas Energy Resources, LLC to Report Financial Results for the First Quarter 2008 and to Host Earnings Conference Call

PITTSBURGH, PA--(Marketwire - April 24, 2008) - Atlas Energy Resources, LLC (NYSE: ATN)
announced today that it will release its results for the first quarter 2008
on Wednesday, April 30, 2008 after market hours, and invites investors and
other interested parties to listen to the live webcast of its quarterly
conference call on Thursday, May 1, 2008, at 9:00 a.m. Eastern Time.

This call is being webcast live and can be accessed by investors and other
interested parties from the Investor Relations section of Atlas Energy's
website at www.atlasenergyresources.com. For those unavailable to listen
to the live broadcast, the replay of the webcast will be available
following the live call on the Atlas Energy Resources website and
telephonically beginning at 11:00 a.m. ET on May 1, 2008 by dialing
888-286-8010, passcode: 67556163.

Atlas Energy Resources, LLC develops and produces domestic natural gas and
to a lesser extent, oil. Atlas Energy is one of the largest independent
energy producers in the Appalachian Basin and northern Michigan. The
Company sponsors and manages tax-advantaged investment partnerships, in
which it co-invests, to finance the exploration and development of the
Company's acreage in the Appalachian Basin. Atlas Energy is active
principally in Pennsylvania, Michigan and Tennessee. For more information,
visit Atlas Energy's website at www.atlasenergyresources.com or contact
investor relations at bbegley@atlasamerica.com.